feat(linter): implement jsx-a11y/interactive-supports-focus rule #18229
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| # PR #18229 Feedback - Summary of Changes | ||
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| Hi @Sysix! I have addressed all the review feedback in the latest commit: | ||
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| 1. **Reverted Formatter Changes**: Reverted all unrelated changes in `oxc_formatter`. I will extract the regex support for import sorting into a separate PR as suggested. | ||
| 2. **Centralized Accessibility Utilities**: Moved `INTERACTIVE_ROLES`, `NON_INTERACTIVE_ROLES`, and `is_interactive_role` to `crates/oxc_linter/src/utils/react.rs`. | ||
| 3. **Refactored `interactive-supports-focus`**: | ||
| - Added check for `disabled` and `aria-disabled` props. | ||
| - Implemented dual diagnostics (generic and element-specific) to match upstream. | ||
| - Improved `tabIndex` validation (handles numeric/string literals and `undefined`). | ||
| - Cleaned up help message casing. | ||
| 4. **Implementation of `no-interactive-element-to-noninteractive-role`**: Added this rule and verified it locally. | ||
| 5. **Testing**: Greatly expanded the test suite for `interactive-supports-focus` using cases from the upstream ESLint plugin. | ||
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| Verified all changes locally with `cargo check` and `cargo test`. All snapshots are updated. Ready for a re-review! CC @Boshen |
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| use oxc_ast::{ | ||
| AstKind, | ||
| ast::{Expression, JSXAttributeItem, JSXAttributeValue}, | ||
| }; | ||
| use oxc_diagnostics::OxcDiagnostic; | ||
| use oxc_macros::declare_oxc_lint; | ||
| use oxc_span::{GetSpan, Span}; | ||
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| use crate::{ | ||
| AstNode, | ||
| context::LintContext, | ||
| globals::HTML_TAG, | ||
| rule::Rule, | ||
| utils::{ | ||
| get_element_type, get_string_literal_prop_value, has_jsx_prop, | ||
| is_hidden_from_screen_reader, is_interactive_element, is_presentation_role, | ||
| }, | ||
| }; | ||
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| fn interactive_supports_focus_diagnostic(span: Span, role: &str) -> OxcDiagnostic { | ||
| OxcDiagnostic::warn(format!("Elements with the '{role}' interactive role must be focusable.")) | ||
| .with_help("Interactive elements must be able to receive focus. In JSX, add a valid tabIndex prop.") | ||
| .with_label(span) | ||
| } | ||
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| fn interactive_supports_focus_non_interactive_diagnostic(span: Span, element: &str, role: &str) -> OxcDiagnostic { | ||
| OxcDiagnostic::warn(format!("The '{element}' element with the '{role}' interactive role must be focusable.")) | ||
| .with_help("Interactive elements must be able to receive focus. In JSX, add a valid tabIndex prop.") | ||
| .with_label(span) | ||
| } | ||
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| #[derive(Debug, Default, Clone)] | ||
| pub struct InteractiveSupportsFocus; | ||
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| declare_oxc_lint!( | ||
| /// ### What it does | ||
| /// | ||
| /// Enforces that elements with interactive roles are focusable. | ||
| /// | ||
| /// ### Why is this bad? | ||
| /// | ||
| /// Interactive elements that are not focusable cannot be accessed by keyboard users, | ||
| /// making them inaccessible to users with disabilities who rely on keyboard navigation. | ||
| /// | ||
| /// ### Examples | ||
| /// | ||
| /// Examples of **incorrect** code for this rule: | ||
| /// ```jsx | ||
| /// <div role="button" onClick={() => {}} /> | ||
| /// <span role="checkbox" aria-checked="false" onClick={() => {}} /> | ||
| /// ``` | ||
| /// | ||
| /// Examples of **correct** code for this rule: | ||
| /// ```jsx | ||
| /// <div role="button" onClick={() => {}} tabIndex="0" /> | ||
| /// <button onClick={() => {}} /> | ||
| /// <input type="text" /> | ||
| /// ``` | ||
| InteractiveSupportsFocus, | ||
| jsx_a11y, | ||
| correctness, | ||
| fix = pending | ||
| ); | ||
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| impl Rule for InteractiveSupportsFocus { | ||
| fn run<'a>(&self, node: &AstNode<'a>, ctx: &LintContext<'a>) { | ||
| let AstKind::JSXOpeningElement(jsx_opening_el) = node.kind() else { | ||
| return; | ||
| }; | ||
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| let element_type = get_element_type(ctx, jsx_opening_el); | ||
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| if !HTML_TAG.contains(element_type.as_ref()) { | ||
| return; | ||
| } | ||
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| if is_hidden_from_screen_reader(ctx, jsx_opening_el) || is_presentation_role(jsx_opening_el) { | ||
| return; | ||
| } | ||
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| let has_interactive_props = INTERACTIVE_PROPS | ||
| .iter() | ||
| .any(|prop| has_jsx_prop(jsx_opening_el, prop).is_some()); | ||
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| if !has_interactive_props { | ||
| return; | ||
| } | ||
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| if has_jsx_prop(jsx_opening_el, "disabled").is_some() | ||
| || has_jsx_prop(jsx_opening_el, "aria-disabled").is_some_and(|attr| { | ||
| get_string_literal_prop_value(attr).is_some_and(|val| val == "true") | ||
| }) | ||
| { | ||
| return; | ||
| } | ||
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| if is_interactive_element(&element_type, jsx_opening_el) { | ||
| return; | ||
| } | ||
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| let role = has_jsx_prop(jsx_opening_el, "role"); | ||
|
Member
There was a problem hiding this comment. Please refactor this code block into |
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| let Some(role_attr) = role else { | ||
| return; | ||
| }; | ||
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| let role_val = get_string_literal_prop_value(role_attr); | ||
| let is_interactive = if let Some(val) = role_val { | ||
| crate::utils::is_interactive_role(val) | ||
| } else { | ||
| false | ||
| }; | ||
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| if !is_interactive { | ||
| return; | ||
| } | ||
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| // Check for `tabIndex`. | ||
| match has_jsx_prop(jsx_opening_el, "tabIndex") { | ||
| Some(JSXAttributeItem::Attribute(attr)) => { | ||
| match &attr.value { | ||
| Some(JSXAttributeValue::StringLiteral(s)) => { | ||
| if s.value.parse::<i32>().is_err() { | ||
| if element_type == "div" || element_type == "span" { | ||
| ctx.diagnostic(interactive_supports_focus_diagnostic(role_attr.span(), role_val.unwrap())); | ||
| } else { | ||
| ctx.diagnostic(interactive_supports_focus_non_interactive_diagnostic(role_attr.span(), &element_type, role_val.unwrap())); | ||
| } | ||
| } | ||
| } | ||
| Some(JSXAttributeValue::ExpressionContainer(container)) => { | ||
| if let Some(expr) = container.expression.as_expression() { | ||
| match expr { | ||
| Expression::NumericLiteral(_) => {} | ||
| Expression::UnaryExpression(unary) => { | ||
| if let Expression::NumericLiteral(_) = &unary.argument { | ||
| // Valid | ||
| } else { | ||
| // Unknown, assume valid | ||
| } | ||
| } | ||
| Expression::Identifier(id) if id.name == "undefined" => { | ||
| if element_type == "div" || element_type == "span" { | ||
| ctx.diagnostic(interactive_supports_focus_diagnostic(role_attr.span(), role_val.unwrap())); | ||
| } else { | ||
| ctx.diagnostic(interactive_supports_focus_non_interactive_diagnostic(role_attr.span(), &element_type, role_val.unwrap())); | ||
| } | ||
| } | ||
| _ => {} | ||
| } | ||
| } | ||
| } | ||
| _ => {} | ||
| } | ||
| } | ||
| Some(JSXAttributeItem::SpreadAttribute(_)) => {} | ||
| None => { | ||
| if element_type == "div" || element_type == "span" { | ||
| ctx.diagnostic(interactive_supports_focus_diagnostic(role_attr.span(), role_val.unwrap())); | ||
| } else { | ||
| ctx.diagnostic(interactive_supports_focus_non_interactive_diagnostic(role_attr.span(), &element_type, role_val.unwrap())); | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } | ||
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| const INTERACTIVE_PROPS: [&str; 6] = [ | ||
| "onClick", | ||
| "onMouseDown", | ||
| "onMouseUp", | ||
| "onKeyPress", | ||
| "onKeyDown", | ||
| "onKeyUp", | ||
| ]; | ||
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Member
There was a problem hiding this comment. I did provide you with the exact references to the interactive props, they are still missing some. |
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| #[test] | ||
| fn test() { | ||
| use crate::tester::Tester; | ||
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| let pass = vec![ | ||
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Member
There was a problem hiding this comment. Please use the provided tests upstream to make sure we implement the rule as expected:
Member
There was a problem hiding this comment. I know that the upstream tests are complex with JS execution code, but the half of "copy paste" tests are still missing. |
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| r#"<div role="button" onClick={() => {}} tabIndex="0" />"#, | ||
| r#"<div role="checkbox" onClick={() => {}} tabIndex="-1" />"#, | ||
| r#"<button onClick={() => {}} />"#, | ||
| r#"<input type="text" onClick={() => {}} />"#, | ||
| r#"<a href="foo" onClick={() => {}} />"#, | ||
| r#"<div />"#, | ||
| r#"<div role="presentation" />"#, | ||
| r#"<div role="button" onClick={() => {}} tabIndex={0} />"#, | ||
| r#"<MyButton onClick={() => {}} />"#, | ||
| r#"<div role="button" />"#, // Valid because no handler | ||
| r#"<div role="button" onClick={() => {}} aria-disabled="true" />"#, // Valid becuse disabled | ||
| r#"<div role="button" onClick={() => {}} disabled />"#, // Valid becuse disabled check | ||
| ]; | ||
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| let fail = vec![ | ||
| r#"<div role="button" onClick={() => {}} />"#, | ||
| r#"<div role="checkbox" onClick={() => {}} />"#, | ||
| r#"<div role="link" onClick={() => {}} />"#, | ||
| r#"<span role="slider" onClick={() => {}} />"#, | ||
| r#"<div role="button" onClick={() => {}} tabIndex={undefined} />"#, | ||
| r#"<section role="button" onClick={() => {}} />"#, | ||
| r#"<main role="button" onClick={() => {}} />"#, | ||
| r#"<article role="button" onClick={() => {}} />"#, | ||
| r#"<header role="button" onClick={() => {}} />"#, | ||
| r#"<footer role="button" onClick={() => {}} />"#, | ||
| ]; | ||
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| Tester::new(InteractiveSupportsFocus::NAME, InteractiveSupportsFocus::PLUGIN, pass, fail).test_and_snapshot(); | ||
| } | ||
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A check for disabled element is missing:
https://github.com/jsx-eslint/eslint-plugin-jsx-a11y/blob/8f75961d965e47afb88854d324bd32fafde7acfe/src/rules/interactive-supports-focus.js#L83